A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil?

Explanation

Given, mutual inductance of coil M = 1.5 H, Current change in coil dI=20-0 =20 A Time taken in change dt= 0.5s. Induced emf in the coil `e=M(dI)/(dt)=(dphi)/(dt) dphi=M.dI=1.5xx20, dphi, dphi=30Wb`, Thus the change of flux linkage is 30 Wb.